Printing-press.



mi 637,609. Patented Nov. 2|, |899.

E. HETT.

PRINTING PRESS.

(Appn'emen med sept, 4, 169e. Renewed my 1s, 1899.) (Ilo Model.) Y 3 Sheets-Sheet I.

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Patented Nov. 2|, |899. `4

E. HETT.

PRINTING PRESS. j (Appliation Bled Sept. 1896. vRaaxmwed May 18, 1899.)

No Masi.)

I' INVENTOR WITN ESSES:

N0. 637,609.' Patented Nov. 2|, |899.

E. HETT.

' PRINTING PRESS.

(Application filed Sept. 4, 1896. Renewed May 18, 1899.) Y (No Model.) 3 Sheets-Sheet 3.

WITNEssEs: INVENTOR BY/m wa? ATTORNEY@ ivi-IED STATESv PATENT Fries.

EDWARD HETT, OF NEW YORK, N. Y.

PRINTING-PRESS.

SPECIFICATION forming part ef Letters Patent No. 637,609, dated November 21, 1899. Application liled September 4, 1896. Renewed May 18, 1899. Serial No. 717,288. ('No model.)

T0 @ZZ whom it may concern:

Be it known that I, EDWARD HETT, a citizen of the United States, and a resident of New York, (New Dorp,Staten Island,) in the county of Richmond and State of New York, have invented a new and useful Improvement in Printing-Presses, of which the following is a specification.

This invention relates to reciprocating mechanism adapted for any purpose for which such mechanism may be applied, but more especially designed to be practically used by me in a lithographic'or printing machine.

It has foritsobject the attaining of such reciprocating motion with certainty and power in both directions; and it consists of the combinations hereinafter set forth.

In the accompanying drawings, which form a part of this specification, Figure 1 is a side view of a multicolor-printing press embodying my invention. y In-this view certain portions are broken'away to show the underlying parts. The multicolorprinting press shown has a central impression drum or surface and has arranged around the outer surface thereof some fifteen cylindrical printingsurfaces. Fig. 2 is an end view of the same, partly in section, with all of the printing cylinders or surfaces removed, excepting only one. Figs. 3, 4., 5, and 6 are I detail views showing diagranlmatically portions of the mechanism for moving the printing-surfaces toward and from the impression-surface.

In the drawings nothing is shown of the inking or dampening devices such as would be employed in lithographie printing, (for which/the' machine is primarily designed,) because such parts have nothing to do with the present invention. For the same reason the mechanism for driving the impressiondrum and the several printing-cylinders positively together for the purpose of printing is not shown (except in some part in Fig. 2) and need not be here described. Nor is the apparatus for delivering the paper to and taking it from the machine shown, nor the apparatus for holding the paper on the drum.

The fixed supporting parts or frame of the machine are shown at 10 in the drawings,

11 is the impression drum or surface.

l2 12 are the cylindrical printing-surfaces. These printing-surfaces are supported and revolve in boxes or bearings 27, which are capable of sliding in radial slideways in the frame of the machine. Secured to these sliding boxes by the adjusting-nuts 28 28 and the holding-nuts 29 are the movable pressure rods or bars 16, which slide radially in suitable guideways in the frame of the machine and carry the sliding boxes 27, and so the printingsurfaces 12. The thrusting outward orinward of Vthese pressure-bars raises the printing-surfaces away from the impression-surface or presses them down hard onto the impressionsurface. The latter operation gives the name to these pressure-bars. The'pressure-bars 16 are operated each one of them by a double set 0f reversed toggle-levers, which are shown diagrammatically in Figs. 3, 4, 5,l and 6, those figures representing the four diferent positions of one double set of toggle-levers in operation. Fig. 3 represents the position of the parts when the printing surface is being pressed down hard on the impression-surface,

as in the act of printing. At such time the center pin 22 has, by suitable mechanism to be hereinafter described, been forced into the position shown in Fig. 3, thereby straightening the toggle-levers 19 2O and forcing the pressure-bar 16 inward toward the center of the drum and the printing-surface 12 down hard onto the impression-surface l1, and this with great power. To accomplish this, one arm 19 of this set of toggle-levers is pivoted at 25 to the frame of the machine, While the other arm 2O is pivoted at 26 to the pressurebar16. The position of the parts when the printing-surface is raised from the impression-surface is shown in Fig. 5, where the other and reversed set of toggle-'levers 17 18 have just forced the printing-surface into the position there shown and are holding it there. To this end the .link 18 of this set of toggle-levers is pivoted at 23 to the frame of the machine, and the other arm 17 is pivoted at 24 to the pressure-bar, and the central pin or pivot 2l has been moved into the position there shown by suitable means hereinafter described. The movement of the parts from the position shown in Fig. 3 to that shown in Fig. 5 is indicated by Fig. 4e and by the arrow and lines on Fig. 3 indicating motion. Fig. 4. shows the position of IOO- position of Fig. 3 to the position of Fig. A5. The two central pins 22 and 21 hayefbeen simultaneously and by suitable mechanism swung in the direction of the arrow on Fig. 3. A further motion of that shifting device in the same direction (indicated by the arrow on Fig. 4) brings the parts :finally to the position shown in Fig. 5.

lines 'in Fig. v5 indicating motion.

igure until they reach .the position indicated in Fig. ,6.o The pin 22 :of the arm 19 and the pin 21 of the ar-m 17 work in slots 22' and 2l operation, the toggles being pivotally fixedfat their ends. Of course, instead of the pinvand-slot connection being at the points where the vmembers .of a toggle are connected together, this pin-and-slo-t connection -could be employed at either or both -ends of Va toggle. The .motion of the shifting device continues in the same direction (indicated by the-arrow in Fig. 6) until the parts iinallyreach the position shown Iin Fig. `3. double ,set of reversedtoggle-levers 17 18and 19 2O great power is obtained at the latter endof each stroke-that is to say, at -t-he latter end lof the move-ment of the printing-surface dow-n onto and into contact with the impression-surface and also at the latterend of the stroke of the Vprinting-surface up and away from the impression-surface.

22 21 of Ithe series of double sets of reverse toggle-levers, I provide the -following'mechanism, which may be varied, however, without Y To shift the series of central pins-or pivots departing 4from my invention. .Theshaft 13, suitably driven, .-oscillates a segmental lever 14:, which is centered-or fulcrumed wi-.ththe main drum of the machin-e, ason the bearingboXes 30, which carry the shaft -of the miaiffn drum 11. Bolted to this segmental lever 14 arecir-cular plates having slots or jaws 15 adapting them to circumferentially oscillate the entire series 'of centr-al pins or pivots 2:2

21 whenever they themselves oscililate with the :lever 14.

What Iclaim as new, `and desire to secure by Letters Patent, is

1. Ina printing-press, the combination,

substantially/as set forth, with .a suitable im- 12. In a printingpress, -t-he combination, subs-tantial-lyas set forth, with a suitable imj pression-surfacefand aseries of suitable print- The reverse mo tion of the parts in passing from the position f shown in Fig. '5 to the position shown in Fig. 3 is indicated by Fig. 6 and by the arrow and To ,ac-A complish'th'is reverse'motion, the shifting d'ef vice shifts thetwo pins'22 and 21 of Fig. S5 in the direction indicated by the arrow in that By the use -of this' ing-surfaces, of vmechanism for moving the printing-surfaces toward and from the impression-surface, said mechanisminclud'inga series of movable pressure-bars, a series of double sets of reversed toggle-levers, and a device to simultaneously operate the togglelevers. Y l

3. The combination of pressure-bar 16, togglelevers 17 and 18, toggle-levers 19 and 20, operating-pins 21 and 22,A and a device to si- -multaneously operate the pins, said pins be- ,ingsecured to onemember of each set'of toggle-levers and sliding in a slot in the other, substantially asset forth.

' 4. lIn reciprocatingmechanism, the combination of a device to be reciprocated, .and a double set-of reversed togg'les operatively connected vwith said device, said togglesfdisposed onthefsame side of said deviceand side by-side, andso arran ged `and connected that whenone set is :straightened said device is .movedinone direction, vand when 'the other set vis straightened said device is moved in theoppositedirection, substantially asset forth.

5. In a reciproca-ting -mechanismythe coin-bination of a-device td be reciprocated, and a doubleset of reversed toggles'operatively con nected with said device, said toggles disposed on the same side of said device a-nd 4side by side, :and sol arranged and connected that when one set is straightened said device -is moved in one direction, and when the vother set is straightened said device is moved'in the opposite direction, and means for simultaneously yoperating -both sets of toggles, substantial-1y as set forth.

IOO

'6. In reciprocating mechanism, the Acombination of a 'device to be reciprocated, and a double setof reversed togglesvoperati-velyconnected withl said device,said toggles [so arranged and connected that when one `set is .straightened said device is-moved in one direction, and vwhen the other set' is straightcned said device is moved in the Vopposite idiyrection, and `a rocking arm for vsimultaneouslyoperating both sets of toggles and engaging both sets of toggles substantially at the points where .their 'members are :pivotally connected, substantially asset forth.

7. I-nreciprocatin-g mechanism, the combination of a device to be reciprocated, a lreciprocating baiL .supporting said device, and a double set of reversed toggles operatively connected with .said bar, said toggles soarranged `and connected that when one :set is straightened said device :is moved in one direction, .and when the 'other set 'is :straightened rsaiddevice is inoved in the opposite'direction, and a rocking arm for simultaneously operating both sets of toggles and engaging both sets of toggles substantially at the points where-their members are pivotally connected, substantially asset forth. 'i

8. Infalithographic machine the combination of a-pri-nting-surface, 'a s'u-rfacefdesigned to be brought into contact with the printingv surface and lmechanism for moving lsaid 'sur- IIO anism including a pressure-bar and a double set of reversed toggles operatively connected with said bar and so arranged and connected that when one toggle is straightened the surfaces are separated and when the other togp gle is straightened the surfaces are brought together, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

EDWARD HETT. Witnesses:

EDWIN SEGER, CHARLES J. PUPKL 

